.desc{
    width: 550px;
    height: 200px;
    margin-top: 30px;
  }
  .demo {
      flex: 3;
      font-size: 18px;
      text-align: center;
      display: flex;
      justify-content: space-around;
      flex-direction: column;
      align-items: center;
  }
  .date{
    margin-bottom: 20px;
  }